Finding the Fourth Proportional to 21,212,698.42, 31,841,312.15 and 18,799,291.99
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Solution
The fourth proportional to 21,212,698.42, 31,841,312.15 and 18,799,291.99 is: 28,218,669.43
Step by Step Solution
- Step 1: Write the proportion equation
21,212,698.42 : 31,841,312.15 = 18,799,291.99 : x - Step 2: Convert to fraction form
21,212,698.42/31,841,312.15 = 18,799,291.99/x - Step 3: Cross multiply
21,212,698.42x = 31,841,312.15 × 18,799,291.99 - Step 4: Simplify right side
21,212,698.42x = 598,594,124,452,584.62 - Step 5: Solve for x
x = 598,594,124,452,584.62/21,212,698.42 - Step 6: Final answer
x = 28,218,669.43
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.